3) Is power a consideration (i.e. are you using a battery)?
Just a note on clarity of communication: the term "power" can mean any kind of power--battery, mains, back-up generator, solar panel, etc.. Sounds like you're using it, here, as shorthand for "mains power", judging by the qualifier ("i.e. are you using a battery").
Judging by the lack of the OP's acknowledgement on the topic of mains power, I would say there was a lack of comprehension.
It's like saying "I received a call". A call on what, a radio, a telephone, an intercom, a smoke signal? Normally, the context will sort it out: a John Ford western: smoke signal--a boat out at sea: marine radio--a Tudball/Wiggins Burnett sketch: intercom--etc.
The context, here on this Forum, is not always so clear. Just something to consider.
[who refers to a smoke signal as "receiving a call"?!?]